Connecting plug



l gp

WILLIAM E. RECKEN, 0F GLENDALE, NEW YORK, ASSKGNOR T0 W COMPANY, INCORPORATED, 0F NEW YQE, N. Y., A CORPORATION 0E' Y@ UONNECTING PLUG.

Application led `(april 26, 1918. Serial No.. Z.

To all whom it may concern.'

Be it known that l. WILLIAM E. RIECKEN, a citizen of the United States, residing at Glendale, in the county of Queens, State of New York, have invented certain new and useful Improvements in Connecting Plugs, of which the following is a full, clear, concise, and exact description.

rl'his invention relates to connecting plugs and particularly to a connecting plug adapted to be used as the terminal of a telephone cord and to cooperate with a telephone jack.

It is usual in connecting plugs of the class referred to, to provide in addition to the contact making portions, a handle portion which is utilized in inserting a plug into a jack and it is also common to provide the handle portion with an insulating sleeve.

It has, heretofore, been the general practice to utilize the insulatino sleeve also as a cover for a recess of the body portion of the plug in which recess is provided the terminals for the electrical conductors which are associated with the plug. ln order to permit access to these connections, it has been the practice to make the insulating sleeve removable and to secure it in place by means of a small screw passing through an'aperture of the insulating sleeve.

lt has also been proposed to employ other fastening means for this purpose, such as, for example` a. spring pressed pin carried by the plug and adapted to engage the insulating sleeve. However, as the body portion of the plug is necessarily limited in size, and space is necessary for the mounting of binding screws to prevent the attaching of electrical conductors to the plug, it is desirable to provide a fastening device, the operating parts of which occupy little space and which does not interfere with the bindingscrews or conductors associated with the plug.Y

In order to attain this desirable result in accordance with a feature of the invention, the space or clearance between the walls of the aperture usually provided for the introduction of electrical conductors therein and the conductors, is utilized to provide a space for the spring actuating member by the fastening device.

More specifically in accordance with this feature of the invention, the fastening device takes the form of a spring-pressed member or pin passingl through a Wall of the plug and the insu ating sleeve surrounding means of a substantially semi-circular spring engaging the inner walls of the body portion of the plug so that the conductors may be passed to attaching points or binding screws within the plug Without in an Way interfering with the spring-presse member or with its spring.

rlhese and other features of the invention, not speciicall mentioned above, will more fully appear rom the annexed specification and the accompanying drawing, in which Fig. 1 is a plan view of the plug with the insulating sleeve shown in section; Fig. 2 is a vertical section through the plug and sleeve; and Fig. 3 is a detail View in perspective showing the mounting of the spring-pressed member of the invention.

The plug of the invention is of the twoconductor type, that is, it provides for the extension to suitable contacts of the jack of two conductors. The plug consists of a body portion indicated at l and a rejecting portion or stem indicated at 2, w ich projecting portion is adapted to be inserted in a suitable jack. The projecting portion 2 is provided with a longitudinal bore in which is inserted an insulating sleeve 3 which projects beyond the portion 2 and which in turn provides aseat for the conducting rod 4 which is oppositely screw-threaded on o posite ends. Secured to the outer end of t e rod 4c is the tip conducting piece 5 which is separated from a dead sleeve 6 byfmeans of an insulating washer 7. The dead sleeve 6 is also similarly electrically separated from the portion 2 b means of an insulating washer 8. On t e other end of the rod 4f are secured the terminals 10 and 11 which are separated by an insulatin piece 9 and which are secured in ostion y means of a nut 12. Suitable hin ing screws 13 and la are threaded into apertures in the terminals 10 and 11. Secured to the body portion of the plug by means of the screw 17 is the strain relieving piece l5.

As shown more clearly in lFi s. 2 and 3 the body portion of the plu 1s provided with substantially cylndrica ends which are separated by a rectangular cut-out section. The rear end of the body portion of the plug, however, takes the form of a ring or annulus through which the conductors of a cord 16 together with a strain relievin strand are led to the terminals 13 and 1d an the u strain rrelieving piece 15 respectively.

by and to also retain the spring in position'.

It will be observed that inasmuch as the spring member 21 conforms closely to the inner walls of the ring 23, it does not interfere in any way with the conductors which ass through such ring to thev terminals o the plug.

ln order to remove the sleeve from the plug to obtain access thereto, it is merely .necessary to use a pointed instrument, such as a pencil or the equivalent to depress-the member 2O against the force of the spring 21, thus bringing the ends of the spring 21 together.v The sleeve may then be slid ofi' the plug, since when the member 20 is once depressed, the inner surface of the sleeve Will maintain it in depressed position until the sleeve is removed.

at is claimed is: y

1. A connecting plug comprising a body mesme portion, a removable sleeve for, said body portion, and a retaining means for said movable sleeve therefor, retaining means forsaid sleeve comprising a retaining member arrangedto engage said sleeve, a resilient actuating member therefor confined Within said annular portion and conforming to the inner surface thereof, and means for retaining said actuated member within said annular portion.

3. A connecting plug comprising a body portion, having an annular portion, a removable sleeve therefor, retaining means for said sleeve comprising a retaining member arranged to engage said sleeve, a resilient actuating member therefor confined within said annular portion and conforming to the inner surface thereof, and lugs formed on the ends of said actuating member engaging the edges of said annular portion.

ll'n Witness whereof, li hereunto subscribe my name this 23rd day of April A. D., 1918.

marian a. amenait. 

